hardhat_demo

Hardhat Boilerplate

This repository contains a sample project that you can use as the starting point for your Ethereum project. It's also a great fit for learning the basics of smart contract development.

This project is intended to be used with the Hardhat Beginners Tutorial, but you should be able to follow it by yourself by reading the README and exploring its contracts, tests, scripts and frontend directories.

Quick start

The first things you need to do are cloning this repository and installing its dependencies:

git clone https://github.com/NomicFoundation/hardhat-boilerplate.git
cd hardhat-boilerplate
npm install

Once installed, let's run Hardhat's testing network:

npx hardhat node

Then, on a new terminal, go to the repository's root folder and run this to deploy your contract:

npx hardhat run scripts/deploy.js --network localhost

Finally, we can run the frontend with:

cd frontend
npm install
npm start

Open http://localhost:3000/ to see your Dapp. You will need to have Metamask installed and listening to localhost 8545.

User Guide

You can find detailed instructions on using this repository and many tips in its documentation.

• Writing and compiling contracts
• Setting up the environment
• Testing Contracts
• Setting up Metamask
• Hardhat's full documentation

For a complete introduction to Hardhat, refer to this guide.

What's Included?

This repository uses our recommended hardhat setup, by using our @nomicfoundation/hardhat-toolbox. When you use this plugin, you'll be able to:

• Deploy and interact with your contracts using ethers.js and the hardhat-ethers plugin.
• Test your contracts with Mocha, Chai and our own Hardhat Chai Matchers plugin.
• Interact with Hardhat Network with our Hardhat Network Helpers.
• Verify the source code of your contracts with the hardhat-etherscan plugin.
• Get metrics on the gas used by your contracts with the hardhat-gas-reporter plugin.
• Measure your tests coverage with solidity-coverage.

This project also includes a sample frontend/Dapp, which uses Create React App.

Troubleshooting

• Invalid nonce errors: if you are seeing this error on the npx hardhat node console, try resetting your Metamask account. This will reset the account's transaction history and also the nonce. Open Metamask, click on your account followed by Settings > Advanced > Reset Account.

Setting up your editor

Hardhat for Visual Studio Code is the official Hardhat extension that adds advanced support for Solidity to VSCode. If you use Visual Studio Code, give it a try!

Getting help and updates

If you need help with this project, or with Hardhat in general, please read this guide to learn where and how to get it.

For the latest news about Hardhat, follow us on Twitter, and don't forget to star our GitHub repository!

Happy building!